Przezywalnosc bakterii jogurtowych i probiotycznych w ukladach modelowych mleka niefermentowanego i fermentowanego

• Autorzy: Zareba D , Ziarno M. , Obiedzinski M.

Warianty tytułu

EN

Viability of yoghurt bacteria and probiotic strains in models of fermented and non-fermented milk

• Języki publikacji: PL

Abstrakty

EN

The objective of the study was the qualification of the viability of chosen yoghurt bacteria and probiotic strains in controlled milk models. The aim of this research was to check the predisposition of each culture to meet the requirements of FAO/WHO concerning the therapeutic minimum, and the requirements of FID/IDF concerning the least number of the bacteria throughout the period of product consumption. The controlled milk models were produced with three freeze-dried starter cultures (YC-180, Bb-12, La-5) and one isolate (Lb. casei). The viability of each culture was studied during cold storage (6°C for 4 weeks) of fermented and non-fermented milk samples. The results showed univocally that the viability of LAB in fermented or non-fermented milk samples in cold storage depended on the genus, species and strain of bacteria used, as well on such factors as the acid and oxygen content of the product. During cold storage the yoghurt culture and probiotic strains, except Lb. acidophilus, fulfilled the requirement of the therapeutic minimum in the fermented and non-fermented milk samples. Only the probiotic strain Lb. acidophilus La-5 showed low viability: in the non-fermented milk its population decreased below the required 10⁶ cfu/cm³ already in the 2nd week of cold storage. In the fermented milk, however, the population of Lb. acidophilus decreased below the required 10⁶ cfu/cm³ only between the 2nd and 4th week of cold storage. This study showed the essential influence of storage conditions (time, acid and oxygen content) and the genus, species and strain of bacteria used on their viability.

Słowa kluczowe

PL

zywnosc; mleko fermentowane; mleko niefermentowane; bakterie kwasu mlekowego; bakterie probiotyczne; przezywalnosc bakterii; uklady modelowe; badania laboratoryjne

• Wydawca: -
• Czasopismo: Medycyna Weterynaryjna
• Rocznik: 2008
• Tom: 64
• Numer: 08
• Opis fizyczny: s.1007-1011,rys.,bibliogr.

Twórcy

autor

Zareba D

• Szkola Glowna Gospodarstwa Wiejskiego, ul.Nowoursynowska 159 C, 02-787 Warszawa

autor

Ziarno M.

autor

Obiedzinski M.

Bibliografia

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